Wrench.



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HCWCE lvlobleya WITNESSES.-

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UNITED STATES PATENT OFFICE.

`HENRY E. MOBLEY, OF TRAFALGAR, INDIANA, ASSIGNOR OF ONE-THIRD TO L. ERTSLACK,

OF FRANKLIN, INDIANA, AND ONE-THIRD TO CLAUDE E. RAGSDALE, OF TRAFALGAR,

INDIANA.

WRENCH.

Specification of Letters Patent.

Patented Feb. 11, 1908.

T o all whom t may concern:

Be it known that I, I-IENRY E. MOBLEY, of Trafalgar, county of Johnson,and State of Indiana, have invented a certain new and useful Wrench; andI do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accom anying drawings,in which like letters refer to like parts.

The object of this invention is to provide a simple and improved monkeywrench.

The chief feature of the invention consists in mounting the movable jawfreely slidable upon the shank of the stationary jaw, and having meansmounted in connection with the movable j aw adapted, after the movable jaw has been moved up against the nut or the like t0 be turned into aposition to engage threads on the shank of the stationary jaw and thushold the movable jaw in place. To adjust the wrench for a larger nut,said locking means for the movable jaw is turned so as to disengage thethreads on the shank of the stationary j aw, whereby it can be againfreely slidable into a new position.

The nature of the invention will be understood from the accompanyingdrawings and the following description and claims.

In the drawings Figure 1 is a side elevation of the wrench with themovable jaw locked firmly in position for use on a nut. Fig. 2 shows theright-hand half of the wrench with the parts in position to unlock themovable jaw whereby it is slidable freely. Fig. 3 is a plan view of theleft-hand portion of Fig. 1.

ig. 4 is a longitudinal section on the line 4 4 of Fig. 2looking upward.Fig. 5 is a central longitudinal section on the line 5 5 Of Fig. 3. Fig.6 is an end elevation of the adjusting nut showing the mutilated threadstherein. Fig. 7 is a section 0n the line 7 7 of Fig. 1. Fig. 8 is asection on the line 8-8 of Fig. 2, said Figs. 6, 7, and 8 being on asomewhat larger scale than the preceding figures.

In detail 10 is what may be termed `the fixed jaw, being rigidly securedto its shank 11 which carries a handle 12. The shank 11 is flattened oneach side and the top and bottom surfaces are threaded from a pointbeginning with the handle to a point near the fixed jaw 10. The movablejaw 15 has a hole through it longitudinally, as indicated in Figs. 4, 5,and 8, in which the shank 11 of the Wrench fits loosely so that the jaw15 is slidable on the shank of the fixed jaw 10 into the desiredposition .with relation to said fixed jaw. It is held. in relation withsaid. fixed jaw by means cooperating with the threads on the shank 11.

The movable jaw 15 at its rear end has two threaded rearward extensions16, one on each side of the shank 11, said` extensions having the samewidth as said shank and being concave transversely so that together withsaid shank they form a circular threaded body for the locking nut orsleeve 17 that is mounted on them. This nut 17 is milled on the outsideso that it'can be turned by the thumb and finger, and it is providedwith internal mutilated threads 18, that is, it has a series of threadson two opposite sides that extend each about one fourth the distancearound the nut, and between said two series of threads at two oppositesides there are no threads whatever. This appears plainly in Fig. 6.

It is obvious from this description of the nut 17 that when it is turnedin one position, as for instance in Fig. 6,' these threads will, notengage the threads on the shank 11 of the fixed jaw, and then the jaw 15is readily slidable. But when the nut 17 is turned one fourth of arevolution to the position shown in Fig. 5, the two series of threads 18therein will engage the threads on the top and bottom surfaces oftheshank 11 and thus hold the movable jaw securely against its work.

The nut 17 is held in its two positions by a fiat spring 2() fulcrumedon a screw 21 to one side of the movable jaw 15, and at the other end itis reduced to a point that extends for some distance loosely into a hole22 in the forward side of the nut 17. This hole is so located that whenitis turned down to the position shown in Figs. 6 and 7, the movable jaw will be slid able, and when turned up into the position shown in Fig.8, the nut 17 will lock the jaw 15 in position. The point of the spring2O fits loosely enough in the hole 22 to permit the oscillatory movementof the spring by the nut to the position shown in Figs. 1 and 2.

What I claim as my invention and desire to secure by Letters Patent is:

1. A wrench including a threaded shank with a fixed jaw thereon, a jawslidable on said shank, a nut mounted in connection with the slidablejaw adapted to engage the threads on said shank for holding the movablejaw in the desired position with relation to the fixed jaw and meansactuated by the movement of said nut for stopping and holding said nutin position.

2. A wrench including a shank with mutilated threads thereon, a jawfixed to said shank, another jaw slidable on said shank, a nut mountedin connection with said movable jaw that is provided internally withmutilated threads to engage the threads on said shank, whereby when saidnut is in one position, its threads will engage the threads on the shankand hold the movable jaw fixed, and when in another position of saidnut, its threads will not engage the threads of the shank and said jawwill be freely slidable thereon and means engaged by and actuated by themovement of said nut for stopping and holding said nut in its engagingand disengaging positions.

3. A lWrench including a shank with mutilated threads thereon, a jawfixed to said shank, another jaw slidable on said shank, a nut mountedin connection with said movable jaw that is provided internally withmutilated threads to engage the threads on said shank, whereby when saidnut is in one position, its threads will engage the threads on the shankand hold the movable jaw fixed, and in another position of said nut, itsthreads will not engage the threads of the shank and said jaw will befreely slidable thereon, and means mounted on said slidable jaw andactuated by the movement of said nut for locking said nut in its twopositions.

4. A'wrench including a shank flattened on two opposite sides andthreaded on the top and bottom edges thereof, a jaw fixed to said shank,another jaw slidable on said shank with a rearward threaded extensiontherefrom on each side of said shank, the threads of said extensionsregistering with the threads on the shank and complementing each other,a nut mounted on said threaded extensions from the movable jaw that hasmutilated internal threads which engage the threads on said shank whenthe nut is in one position and disengage the threads when the nut is inanother position, and a spring fulcrumed at one end to said movable jawand in engagement at the other end with said nut so as to hold said nutvin the positions of engagement and disengagement with the threads ofthe shank and yet be swung laterally bypartial rotation of the nut fromone locking position to the other, substantially as set forth.

In witness whereof, I have hereunto affixed my signature in the presenceof the Witnesses herein named.

HENRY E. MOBLEY.

Witnesses:

D. C. SPRAGUE, CLARENCE FRAKER.

